It is obvious MtGox has a virtual monopoly on bitcoin vs fiat currency trading.

I am not saying this must be a bad thing, but I think people who trade in MtGox should be aware of some obvious facts.

MtGox can see how much money is floating in their client accounts, even if this money is not put to order. So say if they see a lot of their customers with dollars ready to buy but not actually putting any orders, they can see that the price will probably rise. Likewise in the reverse, if there are a lot of bitcoins ready to be sold, even if not placed in order, they can see the price is likely to go down.

They can take advantage of this inside knowledge in basically two opposing ways:

1. Stabilize the price of bitcoin. This is the best scenario if they are really interested in the long term future of bitcoin. I am very hopeful this is their objective.2. Rip naive investors off, in a gradual way. The worst scenario and likely very bad for the future of bitcoin.

Ways to combat this insider trade information in MtGox:

1. Do not put much money, fiat or bitcoin, in MtGox. Withdraw bitcoins if you want the pressure for prices rise. Withdraw cash if you want the pressure to fall.2. Play and pledge much more capital in competing exchanges.

Bitcoinia is dealing with leveraged players; it therefore knows exactly where the price has to go to squeeze them out. And if it doesn't fully hedge their position, that's moolah for bitcoinia above and beyond the spread.

Firstly I would like to say that I am making this statement as an individual, and it is by no means the opinion of or in anyway connected to GLBSE or Intersango.

You're all aware of the recent loss of BTC by bitcoinica, and to be fair to them they have said that the losses will come out of their own pockets and not their customers.

What this means is that the loss to bitcoinica is over 80k BTC(the actual loss, and what they said they would cover). That is a shitonne of money, which made me wonder, how in such a short period of time have they made this much profit.

I can tell you that major exchanges combined (and multiplied a couple of times) do not bring in that amount of profit anywhere near that timescale(less than 9 months from launch).

This is very suspicious. I'm all for successful projects but is this not a case of too good to be true?

How can they do it?

As has already been mentioned he can look at the books, but it's more than simply this.

It's being able to look at the books see which way bitcoinica's users (the ones leveraged to the hilt) have bet, and then take the massive amount of bitcoin available to bitcoinica (their users funds) and push the market in the other direction, even just a little bit.

This results in said leveraged users becoming illiquid, losing all their coins as they have to settle, and bitcoinica taking the win(perhaps they even make bets in the opposite direction, who knows).

I wondered why did bitcoinica have a "hot wallet" (of over 40K BTC, bit fat for a hot wallet don't you think) when they had stated before that they keep everything in MtGox and don't actually touch BTC.

Haven't you also wondered who this mystery market mover is? Clearly someone with a lot of bitcoin available to them, not necessarily their own.

You're all aware of the recent loss of BTC by bitcoinica, and to be fair to them they have said that the losses will come out of their own pockets and not their customers.

What this means is that the loss to bitcoinica is over 80k BTC(the actual loss, and what they said they would cover). That is a shitonne of money, which made me wonder, how in such a short period of time have they made this much profit.

I can tell you that MtGox and Intersango combined (and multiplied a couple of times) do not bring in that amount of profit anywhere near that timescale(less than 9 months from launch).

This is very suspicious. I'm all for successful projects but is this not a case of too good to be true?

How can they do it?

Maybe Zhoutong is not using Bitcoinica profits at all to cover the losses. He could have capital from elsewhere. Given his young age it is unlikely it would come from other succesful ventures. But who knows, perhaps his family is rich.

I obviously have no more of an answer than you do, but are you aware that MtGox is running at a loss? This is probably because they have external private investors who are willing to foot the bill, making short-term losses in exchange for the promise of market supremacy when/if things take off.

The same is probably true of bitcoinica. I don't know who has invested in it, but zhoutong has made references to speaking to investors at various points, so it doesn't seem unlikely that wealthy backers would just decide to cover the cost in exchange for a larger stake in one of the most successful bitcoin ventures yet. The loss may have wiped out bitcoinica's profit, but I wouldn't necessarily assume that just just because they are willing to cover their losses out of pocket that they necessarily made all that money through their own business activities.

Another consideration is that large purchases of bitcoins (such as a wealthy external investor covering bitcoinica's losses) won't necessarily happen on mtgox or anywhere observable to us. I know of several large over-the-counter transactions that occur regularly.

http://www.youtube.com/watch?v=WGcO9BB87kEThis video is just perfect for the theme. I must say - I shot this video but posted on the youtube - not me. When I understood (see) that he wants to do this "manipulator" - I dashed to buy "for all 10x to bitcoinica" I made (earned) this a very large sum .. It was too easy ..EDIT Note that not all sites show the "depth of the market" correctly!

1. Zhou stated that he has a rule that he does not do any personal trading of bitcoin for something like 24-48 hours after seeing any privileged information in the database.

2. Nefario, where did you get 80k? I heard 43k. This is probably roughly on the scale of his profits, but like copumpkin said, I wouldn't be surprised if a backer is eating some of this loss.

3. There is no evidence that Zhou is doing any insider trading or betting against his customers, and he has repeatedly asserted that he does not and never will do this. Does he have the power to lie and steal from his customers? Of course, but until there is more evidence than just opportunity, I don't think its fair to be making accusations.

4. I don't think "The Manipulator(s)" is Zhou, but I am pretty sure whoever they are- they use Bitcoinica (leverage makes manipulation easier).